ACR
ACR may refer to:
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Aviation
- IATA airport code for Araracuara Airport in Caquetá Department, Colombia
- Aircraft Classification Rating
Medicine
- Albumin/creatinine ratio in urine
- ACR gene, encoding the enzyme acrosin
- ACR score for rheumatoid arthritis
- American College of Radiology
- American College of Rheumatology
Places
- Accrington railway station, UK, National Rail code
Railways
- Alaska Central Railroad, original name of the Alaska Railroad
- Alberta Central Railway, an historical railroad in Alberta, Canada
- Algoma Central Railway, a railroad in Northern Ontario, Canada
- Anglesey Central Railway, a railroad in Wales, UK
Science and technology
- Absolute Category Rating, a subjective quality test method
- Acumulador de Carga Rápida, a battery electric tram system
- Adobe Camera Raw, a raw image file converter
- Advanced CANDU reactor, a nuclear reactor
- Advanced Communications Riser, a PC slot format
- Advanced Contrast Ratio or Dynamic Contrast in an LCD display
- Anomalous cosmic rays, a type of cosmic rays
- Anonymous call rejection, a voice telephone network calling feature
- Antarctic Cold Reversal, climatic cooling about 14,500 years ago
- Anti Cam-Out Recess, an improved Philips screwdriver
- Attenuation-to-crosstalk ratio of communication links
- Automatic content recognition of video
- Automatic Circuit Recloser, a high voltage switchgear
- Copper tubing for air conditioning and refrigeration
Military and weapons
- AČR, Army of the Czech Republic (Armáda České republiky)
- Adaptive Combat Rifle
- Advanced Combat Rifle, a US Army program
- Armored cavalry regiment of the US army or national guard
- A US Navy hull classification symbol: Armored cruiser (ACR)
Other uses
- Accelerated chart ratio, affects streaming totals in the Official Charts Company's singles chart
- Achi language, a Mayan language of Guatemala
- Americas Cardroom, online poker site
- A Certain Ratio, a British post-punk band
- Dodge Viper ACR, a car